/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package org.buweb.practice;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.*;

/**
 *
 * @author tata
 */
public class TestServlet extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet TestServlet</title>");  
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet TestServlet at " + request.getContextPath () + "</h1>");

            BUClass buClass = new BUClass();
            List cl = buClass.getClassList();
            out.println("<h2>Class List:</h2><ul>");
            
            Iterator it = cl.iterator();
            while(it.hasNext()) {
                out.println("<li>");
                out.println(it.next().toString());
                out.println("</li>");
            }
            
            out.println("</ul>");

            String num1 = request.getParameter("num1");
            String num2 = request.getParameter("num2");
            if (num1 != null && !num1.equals("") && num2 != null && !num2.equals("")) {
                out.println("<p><h2>Addition of two numbers from parameters num1 and num2</h2>");
                int num1Int = Integer.parseInt(num1);
                int num2Int = Integer.parseInt(num2);
                out.println(num1 + " + " + num2 + " = " + String.valueOf(num1Int + num2Int) );
                out.println("</p>");
            }
            
            out.println("</body>");
            out.println("</html>");
        } finally {            
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
